I was fortunate enough to go on the bridge set for Star Trek:TNG and I got a good close up look at the overview display map of the ship. Its a large cut-away drawing of the Enterprise in profile.
Anyway, if you can get a close enough look at it, its full of easter eggs. There are bathroom signs posted around the ship, as well as fire extinguishers and telephones. In the shuttle bay, there is a curled up mouse between the outlines of two shuttles, as well as a Volkswagen bug.